Valve-controlled motor device.



H. G. BREHMER.

VALVE CONTROLLED MOTOR DEVICE.

APPLICATION FILED AUG. o, 1913.

1,120,019, Patented Dec. 8, 19145 2 SHEETS-SHEET1.

wi/b'weooao $9M WW M a w. W 3% H/E NORRIS PETERS 1:0 PHOfOL/IHO, WASH/NaTON, u C

H. G.'BRBHMER.

VALVE CGNTBOLLED MOTOR DEVICE.

APPLIOATION FILED AUG. a, 1913.

1,120,019. Patented Dec. 8, 1914.

2 SHEETS-SHEET 2.

ag igwg lih I I v i I flfl'omua "HE NORRIS PETERS C0. PHOrO-LITDjOUWASHINGION. D. L

iphia,

proved UNITED STATES PATENT OFFIQE.

HERMAN O. BREHMER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO H. W.BUTTERWORTH & SONS COMPANY, A CORPORATION OF PENNSYLVANIA.

VALVE-CONTROLLED MOTOR DEVICE.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed August 6, 1913. Serial No. 783,242.

To all whom it may concern Be it known that I, HERMAN C. Bunn- MER,citizen of the United States, and resident of Philadelphia, county ofPhiladeland State of Pennsylvania, have in vented an Improvement inValve-Controlled Motor Devices, of which the following is aspecification.

This invention relates to valve mechanisms especially intended fortentering machines or the like, and has for an object to provide a valvecontrol which is simple in construction, efficient in operation andsufficiently sensitive in action to respond instantaneously to delicatechanges of working conditions to cause the required periods of releaseof the material feeding mechanism. In devices of this character asheretofore devised, it has been proposed to control the actuation of thetentering tension rolls by pressure means whose action is notsensitively governed, and in practice it has been found that such valveshave not been adapted to fulfil the requirements of delicate andsensitive operation necessary, with the result that the material beingfed, has been damaged through the failure of the valve to respond andrelease the tension at the desired time.

By my present. invention I have devised an automatic means forregulating the pressure or gripping action of the tension rolls of anautomatic feeding mechanism for delivering material to a tenteringmachine or machine of like character, whereby I am enabled to relievethe pressure upon the cloth with certainty and precision at the timeprior to when the strength of the fabric would reach its limit ofstretching without rupture.

It further consists of other novel features of construction, as will behereinafter fully set forth.

'While the more specific use of my imvalve device is intended for clothfeedin devices for tentering machines and is com ined with the tensionapplying rolls, nevertheless my improvements especially reside in thevalve mechanism itself and these improvements form an essential portionof this application.

For the purpose of illustrating my invention, I have shown in theaccompanying drawin s one form thereof which is at present pre erred byme, since the same has been found in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumentalities of which my invention consists can be variouslyarranged; and that my invention is not limited to the precisearrangement and organization of these instrumentalities as herein shownand described.

Figure 1 represents an end elevation of a guide and tension device of atentering machine, embodying my invention; Fig.2 represents a sideelevation of the same; Fig. 3 represents a vertical section of the valvemechanism; Fig. 4 represents a similar section taken at right angles toFig. 3; and Fig. 5 represents a perspective view of a portion of thevalve body.

1 designates a head or bracket provided with a stud 2 adapted to form asuitable removable connection with the main frame of the tenteringmachine, the said bracket being adapted to serve as upright for properlypositioning certain of the guide elements with respect to the materialor fabric carried by the machine.

3 designates a metal guide roll rotatively mounted on a spindle 4, whichlatter in the present instance is suitably bolted to the bracket 1 bymeans of the nut 5, as will be readily understood. 6 designates a secondguide roll, preferably of rubber, mounted in opposed relation to theroll 3, and which, as here shown, is adjustable with respect thereto inorder to vary the space between the two rollers and thus regulate thetension or gripping action of the rollers upon the fabric which isnormally passing between the aforesaid rollers. As here shown, the roll6 is rotatively mounted upon the spindle 7, and the latter is carried bya yoke 8 pivotally mounted in any suitable manner, as shown at 9, to thebracket 1 and which yoke also embodies :1. depending strip 10 by meansof which the said yoke and roll 6 are moved by suitable actuatingmechanism, to be presently described In connection with the strip 10 itwill be noted that a lug 11 is preferably formed integral therewith andserves the purpose of an abutment or contact piece with which theactuating mechanism engages.

It will of course be understood that the rolls 3 and 6 may be of anysuitable material for properly gripping and feeding the material throughthe machine, though in the preferred form of my invention, as beforestated, 1 preferably make the roll 3 of metal while the roll 6 is ofrubber or material of a like nature.

12 designates guide plates fixed to the bracket 1, in any desired orwell known manner, and suitably located with respect to the rolls 3 and6, so as to properly guide the material between the two rolls and alsoprevent the same from becoming entangled with the operating mechanism.

13 designates 'a post, adjustably carried by the bracket 1 and having anapertured end 1% adapted to receive the tubular extension 15 of acylinder 16, said extension projecting through the apertured end 1% andbeing screw threaded to receive the nut 17, by which the parts aresecured in assembled condition. The extension 15 receives the plunger 18having a button or cap 19, and providing a contact member 20 for thepurpose of engaging the lug 11 of the strip 10.

21 designates a piston freely movable within the cylinder 16 andpreferably provided on one side thereof with a depression 22 adapted toreceive the tapered extremity 23 of the plunger 18, whereby movement ofthe said piston is transmitted at certain times, to the parts controlledby the plunger 18.

24 designates a port or ports positioned at suitable intervals in thecylinder 16 in order to relieve the pressure on one side of the piston21, so that the same may move freely in the desired direction.

The cylinder 16, as here shown, has screw threaded engagement at 25 witha casing 26 of a valve mechanism for controlling the operation of thepiston 21 just described. It will be noted that suitable packing 27 isinterposed between the cylinder 16 and the casing 26 in order to preventleakage at the joint.

The casing 26 is of annular construction to receive a valve membercomprising, in the present instance, a body portion 28 having oppositelyprojecting spindles 29 and 30, the former passing through cap 31 at oneend of the casing 26, while the latter 30 projects through the oppositeside of the casing'26 where it is held by means of the screw 32 andWashers 33, but is freely movable with respect to said casing. It willbe noted that the body 28 is formed with a bore 3 1 having communicationwith the passage 35, while a port 36 is adapted to form a communicationbetween said passage 35 and the inlet port 37 from a conduit 38, thislatter being supplied with compressed air or other motive fluid, fromany suitable source.

39 designates the valve plug, which is preferably of tubular form for aportion of its length in order to communicate with the chamber 34 of thevalve body 28, upon which it is seated. This plug 39 is also providedwith a port or ports 40, which, at certain times, are adapted to alinewith an inlet port or ports 41 leading to the interior of the cylinder16. In addition to the inlet ports -10, the plug 39 is also providedwith an exhaust channel 42 which preferably extends from one side of theplug to the other, so that when it is in alinement with the ports 41,the pressure in the cylinder 16 will be relieved and the motive fluidexhausted by way of the port 43 in the casing 26. e

14 designates a trip arm adjustably fixed to the projecting end 29 ofthe valve member 28 by a set screw 52 or the like, and having a threadedstein i5 angular-1y disposed with respect thereto and carrying a counterweight 46 which is normally adjusted so that the valve body 28 ispositioned with the ports 36 and 87 and ports 10 and 41 in alinement, sothat pressure fluid is admitted to the piston 21 and the yoke 8, therebymaintained in proper position to cause the roll 6 to-grip or exertpressure upon the material passing between the two rolls 3 and 6. Bythis construction it will be seen that the valve body 28 may be rockedwithin the casing 26, therefore when the trip it is moved (through theaction of the fabric) to raise the counter weight 46, the valve plug 28will be shifted to exhaust the cylinder 16; but when the said trip arm44 is not in contact with the fabric, the counter weight 46 returns theparts to normal position (Fig. 4).

i7 designates a stud or screw, threaded through the casing 26 andpositioned in the path of movement of the valve body 28, thus serving asa stop to limit its movement in one direction. To provide for adjustmentof the plug 39 which may be necessary owing to wear between the parts, Ihave preferably provided an opening 48 through the valve body 28 inalinement with which there is an opening 49 in the casing 26 of enlargeddiameter, in order to permit a suitable implement to be inserted to movethe valve plug 39 into frictional bearing relation with the side of thecasing 26 adjacent to the ports 41. The valve plug 39is held in adjustedposition by a set screw 50 located at a suitable point. A screw 51 isalso providedv to close the opening 48 andprevent the compressed air orpressure fluid escaping directly to the exhaust, though it will ofcourse be understood that this screw is temporarily removed when theadjustment of the plug is necessary. The aforesaid opening l9 ispreferably closed by asc'rew threaded plug 53 or like device, thoughthis is not necessary.

The operation of the deviceis as follows: The device, embodying theprinciples of my present invention is adapted to be used in connetcionwith the automatic feeding and guidingof cloth to a suitable machine,such as tentering machine or the like, and serves to automaticallyregulate or limit the tension put upon the cloth by the guidingmechanism. The brackets 1 are preferably mounted at opposite sides ofthe machane as will be understood, being suitably placed to bringsimilar sets of rolls 3 and 6 into the path of movement of the selvageedges of the material or cloth passing through the machine. The pairs ofrolls 3 and 6 are placed adjacent or in close proximity to the travelingcloth engaging clips, or clamps, and the movable roll 6 of each pair isnormally under the pressure of the pressure fluid actuating the piston21. With the machine in operation, the cloth passes between the rolls 3and 6 on its way to the conveyor clips or clamps and at this time thecounter weight 4.6 maintains the valve body 28 in such a positionthatthe supply ports l0 are in alinement with the ports 41. The pressurefrom the pipe line 38 is therefore admitted directly to the piston 21,which is of course shifted as shown in Fig. 3 and maintains suflicientpressure upon the yoke 8 to hold the roll 6 in gripping engagement withthe fabric as long as this condition exists. The trip arm 4% is adjustedupon the valve spindle 29 so that its free end is in a positioncorresponding to near the limit of the strength of the stretched fabricwhen of a delicate structure. That is to say, as the material enters themachine and passes through the guide rolls and feeding mechanism, itundergoes a stretching operation, which, if continued beyond a certainpoint, may result in the fabric being torn, and it is at the pointcorresponding to the limit of allowable stretching that the arm 44; isset. Consequently, when the cloth is fully stretched, its selvagestrikes the arm 44: and shifts the spindle 29, thereby causing thecontrol valve 28 to move slightly so as to close the inlet 37 and causethe cylinder 16 to exhaust by way of the channel 42 in the plug 39."This action results in permitting the roll 6 moving away by gravityfrom roll 3 and releasing the gripping action upon the cloth, and thelatter is thereupon prevented from becoming torn or damaged. As thetension due to transverse stretching is relieved, the selvage releasesthe trip 44: and it again operates the valve to supply compressed air tothe piston cylinder 16 and the operation is repeated. In this way theproper degree of lateral stretching may be insured in a more or lesscontinuous manner, so that the fabric is delivered to the cloth clampsof the tentering machine in a uniform and proper Way.

It will now be apparent that I have devised a complete unitary valvemechanism for accomplishing the desired end and one in which the partsare so arranged and collocated as to produce a mechanism which isextremely sensitive in operation.

One of the important features of construction resides in the fact thatthere is only a very small surface of the valve plug in contact with thecasing, so that there is but little resistance to the movement of thevalve body. Also the parts are so made that only a minimum throw of thevalve plug 39 is necessary and as the trip arm 44: is relatively long ascompared to the radius of the valve body and its plug, very little poweris actually required to cause the valve to be operated; a matter ofgreat importance where the fabric is of a delicate nature, such as lacegoods. Another important feature resides in the provision for supplyingthe air pressure through the axis and the body of the valve piecethereby reducing the loss from leakage and preventing friction owing toair currents due to leakage when the air under pressure fills thecasing; moreover by having the pressure fluid supplied through the valvebody and the latter rocking in a casing having atmospheric pressureonly, the construction is simple and no packed or ground joints arerequired. The adjustment of the plug 39 of the valve body is alsoimportant since it enables a close fit to be made Without expensiveconstruction and also permits adjustment to compensate for wear.

The construction is satisfactory and while I prefer it in commercialpractice, I do not restrict myself thereto, as the details may be variedwithout departing from the spirit of the invention.

Having now described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a valve device of the character stated, the combination of acasing forming a hollow chamber, said casing having a port extendingtherethrough and communicating with said chamber, a hollow valve bodyjournaled in the casing and provided with a port and an exhaust channel,said port opening into the hollow interior of the valve body andterminating therein, and said channel opening into said hollow chamberof the casing. said valve body having means for introducing a fluidpressure thereinto, and means for rocking said valve body whereby itsexhaust channel and port are alternately brought into alinemcnt with theport in the casing.

2. In a valve device of the character stated, the combination of acasing forming a hollow chamber, said casing having a port therethroughcommunicating with said chamber, a hollow valve body journaled in thecasing, an adjustable plug for said valve body having a port and anexhaust channel close together circumferentially considered, said portopening; into the hollow interior of the valve body and said channelopening into the hollow chamber of the casin means for permittingadjustment of the plug in the valve body, means for supplying the hollowchamber of the valve body with a pressure fluid, and means for rockingthe valve body whereby its exhaust channel and port are alternatelybrought into alinement with the port in the casing.

3. In a valve device, a main casing-having means for establishingcommunication with the interior thereof, a movable hollow valve body insaid casing having a peripheral outlet port and an axial inlet portcommunicating with its interior and a peripherally arranged exhaustpassage communicating with the atmosphere, said outlet port and passagebeing arranged to be brought alternately in alinement with the means ofcommunication of the main casing, communieating means for supplyingfluid pressure to the interior of the hollow valve body through theaxial port and therefrom through the peripheral port, and means formoving the valve body and main casing relatively to each other.

4. In a valve device, a main casing having a curved inner surface havinga port, combined with a hollow valve body journaled in the main casingand arranged for having its interior in communication with a source offluid pressure, a radially adjustable part on the valve body having aport opening through it into the hollow space within the valve body andalso a transverse channel adjacent to the port, means for holding theadjustable part in adjusted positions on the valve body, and means torock the valve body to bring the port and the channel of its adjustablepart alternately into alinenient with the port in the main casing.

5. In a valve device, a main casing having a curved inner surfaceprovided with a port, combined with a hollow valve body journaled in themain casing and arranged to have its interior in eommunication'with asource of fluid pressure, a radiallv adjustable part on the valve bOdyhaving a port opening through it into the hollow space within the valvebody and also a transverse channel adjacent to the port, means forholding the adjustable part'in adjusted positions on the valve body,means to rock the valve body to bring the port and the channel of itsadjustable part alternately into alinement with the port in the maincasing, and a removable closure forv said valve body whereby provisionis made for inserting a suitable implement into the interior of saidvalve bOCly to adjust the position of said adjustable part.

6. In a valve device, a main casing havinga curved inner surfaceprovided with a port, combined with a hollow valve body journaled in themain casing and arranged to have its interior in communication with asource of fluid pressure, a radially adjustable part on the valve bodyhaving a port opening thro-ughit into the hollow space within the valvebody and also a transverse channel adjacent to the port, means forholding the adjustable part in adjusted positions on the valve body,means to rock the valve body to bring the port and the channel of itsadjustable part alternately intoalinement with the port in the maineasing, means to limit the throw ofsaid valve body in one direction, anda removable closure for said valve body whereby provision is made forinserting a suitable implement into the interior of said valve body toadjust the position of said adjustable part.

In testimony of which invention, I hereunto set my hand.

HERMAN e. BREHMER;

Witnesses:

R. M. HUNTER, E. W. SBIITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C. Y

war

